The Minis are split into two classes based upon motor choice:
Only the following brushless combo is permitted:
HobbyWing EZRun Series 13T/3650-M Combo
Only the Combo-B1 is permitted which consists of the EZRUN-35A speedo and the 13T@3000KV EZRUN-3650M motor. No other brushless speedos or motors are permitted at this time. Speed controller software must not be altered in any way. Altering the standard parameters using the supplied programmer device on it’s own is allowed.
Any commercially available sealed can motor with no less than 20 winds (These must be Mabuchi style, sealed motors with enclosed endbells that do not permit changes to brushes, springs or timing).
Tamiya silver can motors only
Silver can motors from other manufacturers such as Mardave are not permitted
Motors must not be tampered with in any way such as altering the timing
Rules for Formula 1 and Formula 2
Geared or ball diffs permitted
Any 2 wheel drive Tamiya mini (M03, M05, M06 including Pro versions)
Maximum size pinion: 20T
Speed tuned/fast gearsets are not permitted
Chassis modifications to the battery hole are not permitted
7.4v 2s LiPo (or 6 cell NiCad or NiMH)
Any Mini tyre on a 42mm rim (no double inserts or foam tyres)